Little more?! One 300 amp will pull it down. One 200 amp will be like running your AC with your stock setup. Gas milage will drop, and so will performance. Your car should have a 60-80 amp stock. I just put a second alternator on my friends S-10, but he had the spot to mount it.
Two alternators on a FWD car is very complicated. It's possible, but it'll cost $. And finding a 300 amp for that car is gonna be hard. You'll probably end up getting a generic one, and having to fabricate a special mounting bracket. The bigger, the badder, and the more expensive. It'll be harder on your engine, and you MIGHT have to get better engine mounts, or you'll have to be careful and give it some TLC.
Also, wtf do you need that kind of setup? You starting a power company? Lol. Good luck man.